I googled the meaning of the idiom draggin' the line and at least one person thinks it refers to doing a line of cocaine. You can certainly read that into the lyrics. I haven't made a decision on that, but whenever I hear this or any Shondells song it takes me back to Summertimes in the 1960's, and garage bands playing down the street into the night, as I had my face pressed against the window screen when I was supposed to be asleep. Ice cream cones and summer carnivals. The sound of a fan in the window cooling the hot Summer nights. I didn't know what cocaine was in those days.